function convertHTML(str) {
  // Reg Exp for patterns across the entire str
  var regExp = [/&/g, /</g, />/g, /"/g, /'/g];
  var chars = ['&', '<','>','"',"&apos;"];
  // search and replace loop
  for(var i = 0; i < chars.length; i++){
    str = regExp[i][Symbol.replace](str, chars[i]);
  }
  return str;
}
// JS is superior to the "snake"
convertHTML("JS is superior to the 'snake'");